package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

/**
 * ClassName: ShoppingCartImpl
 * Package: com.sky.service.impl
 * Description:
 *
 * @Author 那啥啥
 * @Create 2024/3/18  22:00
 * @Version 1.0
 */
@Service
public class ShoppingCartServiceImpl implements ShoppingCartService {
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    /**
     * 添加购物车
     * @param shoppingCartDTO
     */
    @Override
    public void addShoppingCart(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        shoppingCart.setUserId(BaseContext.getCurrentId());
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);

        //判断加入到购物车的商品是否（加入口味判定）存在，存在加一
        if(list != null && list.size() > 0){
            ShoppingCart cart = list.get(0);
            cart.setNumber(cart.getNumber()+1);
            shoppingCartMapper.updateById(cart);
        }else {

            //不存在，加入
            //判断是菜品还是套餐
            Long dishId = shoppingCartDTO.getDishId();
            if(dishId != null){
                //本次添加为菜品
                Dish dish = dishMapper.getById(dishId);
                shoppingCart.setName(dish.getName());
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setAmount(dish.getPrice());
            }else {
//                本次添加是套餐
                Long setmealId = shoppingCartDTO.getSetmealId();
                Setmeal setmeal = setmealMapper.getById(setmealId);
                shoppingCart.setName(setmeal.getName());
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setAmount(setmeal.getPrice());
            }
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartMapper.insert(shoppingCart);
        }
    }

    /**
     * 查看购物车
     * @return
     */
    @Override
    public List<ShoppingCart> showShoppingCart() {
        Long userId = BaseContext.getCurrentId();
        ShoppingCart cart = ShoppingCart.builder()
                .userId(userId)
                .build();
        List<ShoppingCart> list = shoppingCartMapper.list(cart);

        return list;
    }

    /**
     * 清空购物车
     */
    @Override
    public void cleanShoppingCart() {

        //获取当前用户id
        Long userId = BaseContext.getCurrentId();
        //清空
        shoppingCartMapper.deleteByUserId(userId);
    }

    /**
     * 减掉一个商品
     * @param shoppingCartDTO
     */
    @Override
    public void sub(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        //放入数据userId
        shoppingCart.setUserId(BaseContext.getCurrentId());
        //获取该数据此事数据唯一
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        //数据number是否 > 1//是减一
        if(list != null && list.size() > 0 ){
            ShoppingCart cart = list.get(0);
            if(cart.getNumber() > 1){
                cart.setNumber(cart.getNumber()-1);
                shoppingCartMapper.updateById(cart);
            }else {
                //否 删除
                shoppingCartMapper.deleteByDetail(cart);
            }
        }



    }
}
